Display panel and display device

ABSTRACT

The present disclosure provides a display panel and a display device, which belongs to the field of display technology. The display panel has a display area and a peripheral area, the display area includes a main display area and a transparent display area, and the display panel includes a first sub-pixel, a first pixel driving circuit and a transparent lead. The first sub-pixel is located in the transparent display area, and includes a first pixel electrode; the first pixel driving circuit is located in the peripheral area; and the transparent lead connects the first pixel electrode and the first pixel driving circuit, so that the first pixel driving circuit drives the first sub-pixel to emit light.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is based upon International Application No.PCT/CN2020/119568 filed on Sep. 30, 2020, which is based upon and claimspriority to International Application No. PCT/CN2020/117373 filed onSep. 24, 2020, the entire contents of which are incorporated herein byreference.

TECHNICAL FIELD

The present disclosure relates to the field of display technology, andmore specifically, to a display panel and display device.

BACKGROUND

A current display device is usually provided with a camera forphotographing. In order to maximize a screen-to-body ratio, technologiessuch as notch screen, waterdrop screen, and hole digging in screen haveappeared successively. These technologies reduce an area occupied by acamera in a peripheral area by digging a hole in a part of a displayarea and placing a camera below the digging area, thereby increasing thescreen-to-body ratio. However, the above technique needs to remove apart of the display area, which will cause a part of the display screento fail to display.

In order to avoid removing the display area, one way is to arrange adisplay panel with a transparent display area, and arrange anunder-screen camera at the position corresponding to the transparentdisplay area, so that the area can take into account both camera anddisplay functions and improve user experience. However, currently, thistype of display panel has a problem of that a brightness of thetransparent display area is lower than that of anormal display area,resulting in poor picture quality.

It should be noted that the information of the invention in thebackground art section above is only used to enhance the understandingof the background of the present disclosure, and therefore may includeinformation that does not constitute the prior art known to thoseskilled in the art.

SUMMARY

A first aspect of the present disclosure provides a display panel. Thedisplay panel has a display area and a peripheral area, the display areaincludes a main display area and a transparent display area, and thedisplay panel includes:

at least one first sub-pixel, located in the transparent display area,and including a first pixel electrode;

at least one first pixel driving circuit, located in the peripheralarea;

at least one transparent lead, connecting the first pixel electrode andthe first pixel driving circuit, so that the first pixel driving circuitdrives the first sub-pixel to emit light.

In an exemplary embodiment of the present disclosure, at least two ofthe transparent leads are located on different layers, and projections,in a thickness direction of the display panel, of the transparent leadslocated on the different layers are partially overlapped.

In an exemplary embodiment of the present disclosure, the transparentlead includes a first sub-transparent lead and a second sub-transparentlead connected to each other, the first sub-transparent lead extends ina row direction and is located in the peripheral area, and the secondtransparent sub-lead extends in a column direction and is located atleast in the display area.

In an exemplary embodiment of the present disclosure, the transparentlead includes a material of ITO, silver nanowire or graphene.

In an exemplary embodiment of the present disclosure, the display panelfurther includes:

at least one first gate driving circuit, located in the peripheral area;

at least one first scan line, located in the peripheral area,

the first scan line connects the first gate driving circuit and thefirst pixel driving circuit, so that the first gate driving circuitprovides the first pixel driving circuit with a scan signal.

In an exemplary embodiment of the present disclosure, each of the firstgate driving circuits and each of the first pixel driving circuits arearranged at a same side of the transparent display area.

In an exemplary embodiment of the present disclosure, all the firstsub-pixels are divided into a plurality of rows, and respective firstsub-pixels corresponding to at least one of the first gate drivingcircuits are located in a same row.

In an exemplary embodiment of the present disclosure, respective firstpixel driving circuits connected to the first sub-pixels located in thesame row forms one or more pixel driving circuit islands, and respectivepixel driving circuit islands are arranged in a row direction at a side,close to the transparent display area, of the peripheral area.

In an exemplary embodiment of the present disclosure, the respectivepixel driving circuits in the pixel driving circuit island are arrangedin the row direction, and the first scan line corresponding to the pixeldriving circuit island extends in the row direction and is sequentiallyconnected to the respective pixel driving circuits in the pixel drivingcircuit island.

In an exemplary embodiment of the present disclosure, the display panelfurther includes:

at least one second sub-pixel, located in the main display area, andincluding a second sub-pixel electrode; and

at least one second pixel driving circuit, located in the main displayarea, electrically connected to the second sub-pixel electrode, andconfigured to drive the second sub-pixel to emit light,

wherein pixel densities of the transparent display area and the maindisplay area are same.

In an exemplary embodiment of the present disclosure, the display panelfurther includes:

at least one second gate driving circuit, located in the peripheralarea;

at least one second scan line, located in the peripheral area and thedisplay area,

wherein the second scan line connects the second gate driving circuitand the second pixel driving circuit, so that the second gate drivingcircuit provides the second pixel driving circuit with a scan signal.

In an exemplary embodiment of the present disclosure, the display panelfurther includes:

a plurality of first data lines, connected to the first pixel drivingcircuit and the second pixel driving circuit corresponding to the firstsub-pixel and the second sub-pixel in a same column,

wherein the first data line extends along the column direction andbypasses an edge of the transparent display area.

Another aspect of the present disclosure provides a display device,including the display panel described above and a camera, the camerabeing arranged on a backlight side of the display panel andcorresponding to the transparent display area.

It should be understood that the above general description and thefollowing detailed description are only exemplary and explanatory, andcannot limit the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings herein are incorporated into the specification andconstitute a part of the specification, show embodiments in accordancewith the present disclosure, and are used, together with thespecification, to explain the principle of the present disclosure.Obviously, the drawings in the following description are only someembodiments of the present disclosure. For those skilled in the art,other drawings can be obtained based on these drawings without creativework.

FIG. 1 is a top view of a display panel in an embodiment of the presentdisclosure;

FIG. 2 is a cross-sectional view of a first sub-pixel and a first pixeldriving circuit in an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of a second sub-pixel and a secondpixel driving circuit in an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a structure of transparent leads usingtwo layers in an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of an arrangement of a transparent lead inthe embodiment of the present disclosure;

FIG. 6 is a partial enlarged view of a first arrangement manner of thetransparent lead in FIG. 5;

FIG. 7 is a partial enlarged view of a second arrangement manner of thetransparent lead in FIG. 5;

FIG. 8 is a partial enlarged view of a third arrangement manner of thetransparent lead in FIG. 5;

FIG. 9 is a partial enlarged view of a fourth arrangement manner of thetransparent lead in FIG. 5;

FIGS. 10-13 are schematic diagrams of an arrangement of a first gatedriving circuit in an embodiment of the present disclosure;

FIG. 14 is a schematic diagram of an arrangement of a second scan linein an embodiment of the present disclosure;

FIG. 15 is a schematic diagram of another arrangement of a second scanline in an embodiment of the present disclosure;

FIG. 16 is a schematic diagram of an arrangement of a first data line inan embodiment of the present disclosure; and

FIG. 17 is a timing diagram of a display panel during display accordingto the present disclosure.

DETAILED DESCRIPTION

In the related art, when a display panel is provided with anunder-screen camera in a transparent display area, in order to improvephotographing effect, a light transmittance of the transparent displayarea shall be as high as possible. However, a pixel driving circuitnecessary for display inevitably includes some light-blocking layers,which would block light and thus affect the light transmittance. One wayis to reduce pixel density in the transparent display area, therebyreducing light shielding due to an internal structure of the pixeldriving circuit, and thus increasing the light transmittance. However,since the pixel density in the transparent display area is lower thanthat in a normal display area, the brightness of the transparent displayarea during display will be lower than that of the normal display area,which would cause a visual graininess, resulting in a decrease in imagequality.

In view of the above problem, an embodiment of the present disclosureprovides a display panel, which improves the light transmittance of thetransparent display area without affecting the display effect, and takesinto account both photographing and display effects.

As shown in FIG. 1, according to an embodiment of the presentdisclosure, a display panel has a display area and a peripheral area200. The display area includes a main display area 100B and atransparent display area 100A. The transparent display area 100A is anarea corresponding to a camera, and the remaining normal display area isthe main display area 100B. The display panel includes at least onefirst sub-pixel 11, at least one first pixel driving circuit 12, and atleast one transparent lead 13. The first sub-pixel 11 is located in thetransparent display area 100A and includes a first pixel electrode; thefirst pixel driving circuit 12 is located in the peripheral area 200;the transparent lead 13 connects the first pixel electrode and the firstpixel driving circuit 12, so that the first pixel driving circuit 12drives the first sub-pixel 11 to emit light.

In the present disclosure, the first sub-pixel 11 is normally arrangedin the transparent display area 100A, and the first pixel drivingcircuit 12 corresponding to the first sub-pixel 11 is arranged in theperipheral area 200, which prevents a light-blocking layer in the firstpixel driving circuit 12 from affecting a light transmittance, and thusimproves the light transmittance in the transparent display 100A andensures a good photographing effect. Further, such structure does notaffect a normal display of the transparent display area 100A, and canalso increase a display brightness of the transparent display area 100A.The pixel density of the transparent display area can be set accordingto the situation, for example, to be the same as that of the maindisplay area 100B. The display effect is no longer limited by the pixeldensity, and thus the image quality of the entire display panel isimproved.

The display panel according to the embodiment of the present disclosurewill be described in detail below.

In the present disclosure, the display panel may be an organic lightemitting diode (OLED) display panel, such as an active matrix OLED(AM-OLED) display panel, a quantum dot OLED (QD-OLED) display panel andthe like.

FIG. 1 shows a top view of a display panel in an exemplary embodiment.The display area includes the main display area 100B for displayingimages and the transparent display area 100A corresponding to a cameraposition. The transparent display area 100A displays images, and at thesame time can transmit light so that the camera can receive lightsignals for photographing.

In addition to the circle shown in the figure, the shape of thetransparent display area 100A may also be a rectangle, a roundedrectangle, or other regular or irregular polygons. In addition to oneshown in the figure, the number of the transparent display area 100A canalso be multiple to correspond to different numbers of cameras, so as toachieve different photographing effects. The transparent display area100A may be arranged at the center of the display area, or may bearranged at any corner of the display area. In order to facilitate thedescription of the technical solution of the present disclosure, thefollowing takes that the display panel has one transparent display area100A, and the transparent display area 100A is located at the uppercenter of the display panel as an example for detailed description.

In the exemplary embodiment, a plurality of first sub-pixels 11 aresymmetrically arranged in the transparent display area 100A of thedisplay panel, and correspondingly, a plurality of first pixel drivingcircuits 12 corresponding thereto are symmetrically arranged in theperipheral area 200. For example, there are 16 first sub-pixels 11 inthe figure, which are arranged in two rows, and also, there are 16 firstpixel driving circuits 12. The main display area 100B of the displaypanel has a conventional structure, in which a plurality of secondsub-pixels 21 and a plurality of second pixel driving circuits 22arranged under the second sub-pixels 21 are arranged symmetrically. Thefirst pixel driving circuit 12 is electrically connected to theelectrode of the first sub-pixel 11 through a transparent lead 13 todrive the first sub-pixel 11 to emit light; and the second pixel drivingcircuit 22 is directly electrically connected to the electrode of thesecond sub-pixel 21 to drive the second sub-pixel 21 to emit light.

Taking the first pixel driving circuit as an example, the first pixeldriving circuit 12 includes a driving transistor disposed on a substrate98. As shown in FIG. 2, which shows a cross-sectional view of thedriving transistor, the driving transistor sequentially includes anactive layer 91, a gate insulating layer 90, a gate layer 93, aninterlayer insulating layer 94, a source and drain layer 95, apassivation layer 96 and the like from bottom to top. It should be notedthat the structure of the driving transistor is not limited thereto, andcan be determined according to actual requirements. The second pixeldriving circuit 22 has the same structure as the first pixel drivingcircuit 12, except that the second pixel driving circuit 22 is locatedin the display area, and the first pixel driving circuit 12 is locatedin the peripheral area 200.

Taking the first sub-pixel as an example, the first sub-pixel 11 islocated above the first pixel driving circuit 12 in a thicknessdirection of the display panel. The first sub-pixel 11 may be a redsub-pixel, a green sub-pixel or a blue sub-pixel, and in someembodiments, may also be a white sub-pixel or other color sub-pixels.Referring to FIG. 2 again, the first sub-pixel 11 includes a first pixelelectrode 80, a common electrode 83, and a light emitting layer 82disposed between the first pixel electrode 80 and the common electrode83. The array substrate is also provided with a pixel defining layer 81for defining each sub-pixel. The pixel defining layer 81 has an openingexposing the first pixel electrode 80. The light emitting layer 82 isdisposed in the opening. The common electrode 83 can be a layer entirelycovering the light emitting layer 82 and the pixel defining layer 81.The metal layers with light-blocking influence in the first pixeldriving circuit 12 such as the active layer 91, the gate layer 93, thesource and drain layer 95 are all located in the peripheral area 200,thus avoid an influence on the light transmittance of the transparentdisplay area 100A. The second sub-pixel 21 and the first sub-pixel 11have the same structure, and both are located in the display area. FIG.3 shows the structure of the second pixel driving circuit 22 and thesecond sub-pixel 21.

The first sub-pixel 11 and the first pixel driving circuit 12corresponding thereto are located in different areas, therefore they areconnected by the transparent lead 13, so that the first pixel drivingcircuit 12 can drive the first sub-pixel 11 to emit light. Correspondingto the first sub-pixels 11, there are also a plurality of transparentleads 13, such as 16 as shown in FIG. 1; and the transparent leads 13are symmetrical bilaterally and each extends to the corresponding firstpixel driving circuit 12. The transparent lead 13 is made of atransparent material, and has a light transmittance higher than that ofthe metal layer in the driving circuit, and thus will not affect thelight transmittance of the transparent display area 100A. The materialof the transparent lead 13 includes but is not limited to indium tinoxide semiconductor (ITO), silver nanowire or graphene. The transparentlead made of the above-mentioned materials can make the lighttransmittance of the transparent display area 100A reach 70% or more,which is sufficient to meet photographing and display requirements.

Since the light transmittance of the transparent display area 100A ofthe present disclosure has been improved, the pixel density of thetransparent display area 100A can be made higher, which can be the sameas the pixel density of the main display area 100B, thereby eliminatingthe visual graininess of the transparent display area 100A caused by toolow pixel density, and thus can ensure the same display effect of twoareas.

When the transparent lead 13 is manufactured, the transparent lead 13can be provided in the same layer as conductive layers such as the firstpixel electrode 80 and the source and drain layer 95, or can be anindependently provided layer located between two insulating layers. Whenthe transparent lead 13 adopts the independently provided layer, awiring density of the existing layer in the display area can be reduced,and a mutual influence between lines can be reduced.

For example, in an embodiment, all the transparent leads shown in FIG. 1are arranged in the same layer. FIG. 2 shows that the transparent leadadopts the independently provided layer, and schematically shows thecross-sectional structure of one sub-pixel. The display panel includes afirst insulating layer 301 and a second insulating layer 302. In thethickness direction of the display panel, the two insulating layers areboth provided between the first pixel driving circuit 12 and the firstsub-pixel 11, and the transparent lead 13 is located between the twoinsulating layers. The two insulating layers are both provided with viaholes, and the transparent lead 13 is electrically connected to thecorresponding first pixel electrode 80 and the drain of the first pixeldriving circuit 12 through the via hole.

For another example, in another embodiment, the transparent leads 13corresponding to the first sub-pixels in the two rows shown in FIG. 1are respectively arranged in two layers, that is, the transparent leads13 corresponding to the first sub-pixels in one row are arranged in onelayer, and the transparent leads 13 corresponding to the firstsub-pixels in another row are arranged in another layer. FIG. 4 is aschematic diagram of the structure of the transparent leads using twoindependently provided layers, and schematically shows thecross-sectional structure of two sub-pixels. The display panel includesa first insulating layer 301, a second insulating layer 302, and a thirdinsulating layer 303 stacked from bottom to top. The three insulatinglayers are provided with via holes. In the thickness direction of thedisplay panel, the three insulating layers are all disposed between thefirst pixel driving circuit 12 and the first sub-pixel 11. Thetransparent lead 13 corresponding to the first sub-pixel 11 in one rowis located between the first insulating layer 301 and the secondinsulating layer 302, and is electrically connected to the correspondingfirst pixel electrode 80 and the drain of the first pixel drivingcircuit 12 through the via hole. The transparent lead 13 correspondingto the first sub-pixel 11 in another row is located between the secondinsulating layer 302 and the third insulating layer 303, and iselectrically connected to the corresponding first pixel electrode 80 andthe drain of the first pixel driving circuit 12 through the via hole.

In other embodiments, the transparent leads 13 corresponding to allsub-pixels can be further divided into more layers, such as threelayers, four layers, and so on. Each layer of transparent leads 13 isisolated from another layer of transparent leads 13 by an insulatinglayer, and at the same time, is electrically connected to thecorresponding first pixel electrode 80 and the first pixel drivingcircuit 12 through the via hole opened in the insulating layer. It canbe understood that when the transparent leads 13 are divided into aplurality of layers, the wiring density of the leads can be reduced, andthe parasitic capacitance can be reduced, but the thickness of thedisplay panel will be increased. Therefore, a specific process can beselected according to actual product requirements.

Preferably, as shown in FIG. 1, when a plurality of transparent leads 13are located in different layers, projections, in the thickness directionof the display panel, of the transparent leads 13 of different layers donot overlap with each other, so that the influence between thetransparent leads 13 of two adjacent layers can be reduced as much aspossible. In an embodiment, the projections, in the thickness directionof the display panel, of the transparent leads of different layers mayalso partially overlap with each other, and the thickness of theinsulating layer may be increased at the overlap to reduce the mutualinfluence between the transparent leads of adjacent layers. For example,FIG. 5 is a schematic diagram of an arrangement of the transparent leads13, and FIG. 6 is a partial enlarged view of the arrangement of thetransparent leads 13 in FIG. 5. Referring to FIGS. 5 and 6, thetransparent leads 13 corresponding to the first sub-pixels 11 in thefirst row are located in the same layer, the transparent leads 13corresponding to the first sub-pixels 11 in the second row are locatedin the same layer, and the transparent leads 13 of the two layerspartially overlap. It can be understood that the less overlap, thebetter. Further, in order to facilitate arrangement, the sametransparent lead 13 can also be divided into a plurality of sections andarranged across different layers, and the plurality of sections areconnected to each other through via holes. The specific process can bedesigned according to actual product requirements.

In order to reduce the influence of the transparent lead 13 on otherlayers of the display area, the transparent lead 13 may occupy the areaof the main display area 100B as less as possible. Referring to FIGS. 5and 6 again, the transparent lead 13 includes at least a firstsub-transparent lead 131 and a second sub-transparent lead 132 connectedto each other. The first sub-transparent lead 131 extends in the rowdirection and is located in the peripheral area 200, and the secondsub-transparent lead 132 extends in the column direction and is locatedat least in the display area. In such structure, the transparent lead 13extends upward from the first sub-pixel 11 into the transparent displayarea 100A and the main display area 100B, then into the peripheral area200, and then extends horizontally to the corresponding first pixeldriving circuit 12. In another embodiment, referring to the partialenlarged view of the transparent lead shown in FIG. 7, the transparentlead 13 may also first extend toward the left and right sides into themain display area 100B, and then extends upward into the peripheral area200, for example, the transparent lead corresponding to the firstsub-pixel in the second row. The arrangement method of extending thetransparent lead 13 through the main part outside the transparentdisplay area 100A has been described above. Further, there may be aplurality of arrangement methods of the transparent lead 13 in thetransparent display area 100A, for example, as shown in FIG. 1, thetransparent lead 13 corresponding to the first sub-pixel 11 in the firstrow directly extends upward, and the transparent lead 13 correspondingto the first sub-pixel 11 in the second row directly extends downward;as shown in FIG. 6, the transparent lead 13 corresponding to the firstsub-pixel 11 in the first row directly extends upward, and thetransparent lead 13 corresponding to the first sub-pixel 11 in thesecond row first extends to the right and then extends upward; as shownin FIG. 7, the transparent lead 13 corresponding to the first sub-pixel11 in the first row directly extends upward, and the transparent lead 13corresponding to the first sub-pixel 11 in the second row first extendsupward and then extends to the right. On the other hand, in order tomake the resistances of the transparent leads 13 similar, thetransparent leads 13 connected to the first sub-pixels in differentpositions can be made to have approximate lengths through reasonablearrangement. For example, referring to FIG. 8, the transparent lead 13corresponding to the first sub-pixel in the first row is connected tothe first pixel driving circuit 12 that is farther away, and thetransparent lead 13 corresponding to the first sub-pixel in the secondrow is connected to the first pixel driving circuit 12 that is closer,thereby making all the transparent leads 13 have similar lengths, andthus have similar resistances, to ensure that the display effects ofdifferent first sub-pixels 11 are consistent. The enlarged views ofFIGS. 6-8 only show a two-layer structure of the transparent leads.Referring to FIG. 9, the difference between FIG. 9 and FIG. 6 is thatthe transparent leads in FIG. 9 are arranged in three layers, thetransparent leads corresponding to the first sub-pixels 11 in the firstrow are located in a row, the transparent leads corresponding to theoutside two first sub-pixels 11 at the left and right sides in thesecond row are located in a row, and the transparent leads correspondingto the inside two first sub-pixels 11 at the left and right sides in thesecond row are located in a row. In a word, there can be many kinds ofpaths and layers for the arrangement of the transparent leads 13, andthe design can be carried out according to the actual productrequirements in the specific process.

In the exemplary embodiment, the entire display area adopts the form ofbilateral driving. Referring to FIGS. 1 and 5 again, the peripheral area200 of the display panel includes a plurality of first gate drivingcircuits 14 and a plurality of first scan lines 15 that are symmetrical.The first scan line 15 connects the first gate driving circuit 14 andthe first pixel driving circuit 12, so that the first gate drivingcircuit 14 provides a scan signal to the first pixel driving circuit 12.The peripheral area 200 of the display panel further includes aplurality of second gate driving circuits 23 and a plurality of secondscan lines 24. The second scan line 24 also extends to the main displayarea 100B to connect the second gate driving circuit 23 located in theperipheral area 200 and the second pixel driving circuit 22 located inthe main display area 100B, so that the second gate driving circuit 23provides a scan signal to the second pixel driving circuit 22. In theembodiment, the gate driving circuits of the transparent display area100A and the main display area 100B are separated, and the first gatedriving circuit 14 provided separately provides the scanning signal tothe first pixel driving circuit 12 located in the peripheral area 200,which is convenient for separately controlling the display effect of thetransparent display area 100A to meet the different requirements ofphotographing and display.

In the embodiment, each of the first gate driving circuits 14 and eachof the first pixel driving circuits 12 are located at the same side ofthe transparent display area 100A, that is, the peripheral area 200above the display area in the figure, so that the length between thetransparent lead 13 and the first scan line 15 can be reduced, and theresistance is reduced. In other embodiments, when the transparentdisplay area 100A is located at a corner of the display area, each ofthe first gate driving circuits 14 and each of the first pixel drivingcircuits 12 may also be located at the left or right side close to thetransparent display area 100A.

In the embodiment, the respective first sub-pixels 11 corresponding tothe respective first pixel driving circuits 12 connected to the firstgate driving circuit 14 are located in the same row. Referring to FIG.1, the first pixel driving circuits 12 corresponding to the left fourfirst sub-pixels 11 in the first row are connected to the same firstgate driving circuit 14, and the first pixel driving circuits 12corresponding to the right four first sub-pixels 11 in the first row areconnected to the same first gate driving circuit 14. The second row hassimilar arrangements. Therefore, a row scanning can be realized.

In order to facilitate circuit arrangement, the first pixel drivingcircuits 12 connected to the first sub-pixels in the same row constitutea pixel driving circuit island 121, and the pixel driving circuitislands 121 are arranged in the row direction at the side of theperipheral area 200 close to the transparent display area 100A.Specifically, referring to FIG. 1, the first pixel driving circuits 12corresponding to the left four first sub-pixels 11 in the first rowconstitute one pixel driving circuit island 121, and are connected toone first gate driving circuit 14; and the first pixel driving circuits12 corresponding to the right four first sub-pixels 11 in the first rowconstitutes one pixel driving circuit island 121 and are connected toone first gate driving circuit 14; and the second row has the samearrangement. Four pixel driving circuit islands 121 are arranged in therow direction in the peripheral area 200 above the transparent displayarea 100A, so that all the first pixel driving circuits 12 can be asclose as possible to the corresponding first sub-pixels 11 to reduce thelength of the transparent lead 13, and their arrangement in the rowdirection can reduce the width of the peripheral area 200 and realize anarrow frame arrangement. In other embodiments, the first pixel drivingcircuits 12 connected to the first sub-pixels 11 in each row may alsoform a plurality of pixel driving circuit islands 121, and the pluralityof pixel driving circuit islands 121 are arranged in the row directionto achieve a narrow frame. Further, when the number of pixel drivingcircuit islands 121 is large, the plurality of pixel driving circuitislands 121 may also be arranged in the column direction.

Further, the first pixel driving circuits 12 in each pixel drivingcircuit island 121 are also arranged in the row direction, so that thefirst scan line 15 extends in the row direction to simultaneouslyconnect the first pixel driving circuits 12 in the same pixel drivingcircuit island 121, thereby reducing the length of the first scan line15. Further, the arrangement sequence of the four first pixel drivingcircuits 12 in each pixel driving circuit island 121 is consistent withthe arrangement sequence of the corresponding four first sub-pixels 11,which can prevent the transparent leads 13 from crossing each other. Thearrangement sequence here refers to a sequence from left to right.

It should be noted that in the above embodiment, the first sub-pixels 11located in different rows are driven by different first gate drivingcircuits 14. In another embodiment, one first gate driving circuit 14may be used to drive the first sub-pixels 11 in a plurality of rows, andeven one first gate driving circuit 14 drives the first sub-pixels 11 inall rows, which may further reduce the arrangement space. In actualproducts, the number of first gate driving circuits 14 can be determinedaccording to the space and the number of pixel rows.

When there are a plurality of first gate driving circuits 14, thearrangement of the first gate driving circuits 14 in the peripheral areamay refer to FIGS. 10-13, which respectively show different arrangementsby taking that five first gate driving circuits 14 are located on thesame side as an example. In these figures, the five pixel drivingcircuit islands 121 are all arranged in the row direction. As shown inFIG. 10, the five first gate driving circuits 14 are arranged in an arcshape. As shown in FIG. 11, the five first gate driving circuits 14 arearranged in a stepped manner. As shown in FIG. 12 and FIG. 13, the fivefirst gate driving circuits 14 are all arranged in the row direction,and the difference lies in the arrangement direction of the first gatedriving circuit 14. Regardless of the arrangement, the five first gatedriving circuits 14 are preferably arranged according to the arrangementsequence of the corresponding pixel driving circuit islands 121, so asto reduce the length of each first scan line 15 and avoid the first scanlines 15 from crossing each other.

The arrangement of the plurality of second gate driving circuits 23 inthe peripheral region 200 may be the arrangement in the column directionas shown in FIG. 1. The second scan line 24 corresponding to the secondgate driving circuit 23 extends to the main display area 100B in the rowdirection to drive the corresponding pixel row. As for the pixel rows ofthe main display area 100B corresponding to the transparent display area100A, the extension direction of the second scan line 24 may be arrangedaccording to the specific conditions of the display panel. In theexemplary embodiment shown in FIG. 1, since the transparent display area100A is located in the center of the display area, the left and rightsides of the main display area 100B are symmetrical, the second scanline 24 in the area extends in the row direction to and ends by thetransparent display area 100A. As shown in FIG. 14. In other exemplaryembodiments, the transparent display area 100A is not located in thecenter of the display area, and the left and right sides of the maindisplay area 100B are asymmetrical. At this time, the second scan line24 in the area extends in the row direction and bypasses the edge of thetransparent display area 100A to avoid different loads on both sides, asshown in FIG. 15.

In the exemplary embodiment, the display panel further includes aplurality of first data lines 16, and the first data line 16 is used toprovide data signals to the pixel column of the transparent display area100A. FIG. 16 shows the arrangement of the first data line 16. The firstdata line 16 extends from a data signal driving terminal (not shown,which is usually arranged above the display area), is connected to thesource of the first pixel driving circuit 12 corresponding to the firstsub-pixel 11 in the peripheral area 200, further extends to the displayarea and then bypasses the edge of the transparent display area 100A,and is connected to the source of the second pixel driving circuit 22 inthe same column as that of the first sub-pixel 11 in the main displayarea 100B, thereby providing a data signal to the sub-pixels in the samecolumn of the transparent display area 100A and the main display area100B without affecting the light transmittance of the transparentdisplay area 100A. It can be understood that, in the transparent displayarea 100A, the first data lines 16 connected to the first pixel drivingcircuits 12 corresponding to the two first sub-pixels 11 located in thesame column can be combined. By taking the left second first pixeldriving circuit 12 and the left seventh first pixel driving circuit 12as an example, the first sub-pixels 11 corresponding to the two firstpixel driving circuits 12 are located in the same column, and thereforethe first data lines 16 corresponding to the two first pixel drivingcircuits can be combined, and then bypass the edge of the transparentdisplay area 100A and is connected to the source of the underlyingsecond pixel driving circuit 22 corresponding to the second sub-pixel 21in the same column. The data signals of other pixel columns in the maindisplay area 100B can be provided by conventional second data linesextending along the column direction, which will not be repeated here.

FIG. 17 is a timing diagram of the display panel during display in thepresent disclosure. The transparent display area 100A is scanned beforethe main display area 100B, that is, the start signal of the first gatedriving circuit 14 starts ahead of n cycles (N is the number of pixelrows in the transparent display area 100A). In these n cycles, the firstgate driving circuit 14 corresponding to the transparent display area100A scans row by row, and each first data line 16 provides pixels inthe transparent display area 100A with a data signal. After n cycles,the second gate driving circuit 23 starts to scan line by line. At thistime, the data line corresponding to the main display area 100B providesa data signal to the pixels in the main display area 100B. This achievesa full-screen display. When the transparent display area 100A needsphotographing, the first data line 16 may provide a black picturesignal, so that the transparent display area 100A does not displaypictures, and thus photographing can be performed.

In the above exemplary embodiments, it is only illustrated as an examplethat the display panel has one transparent display area 100A, thetransparent display area 100A is located in the upper center of thedisplay panel, and the driving mode is bilateral driving. Those skilledin the art can understand that in other embodiments, a plurality of theabove-mentioned transparent display areas 100A can be provided in thedisplay panel, and the first pixel driving circuits 12 in thetransparent display areas 100A are all provided in the peripheral area200, so as to improve the light transmittance. In addition, when thetransparent display area 100A is not located on the symmetry axis, thearrangement positions of the first pixel driving circuit 12 and thetransparent lead 13 can be designed according to the actual space.Furthermore, the display panel of the present disclosure can also bedriven in a unilateral driving manner.

An embodiment of the present disclosure also provide a display device,which includes the above-mentioned display panel and a camera, and thecamera is arranged on a backlight side of the display panel andcorresponds to the transparent display area 100A. Since the lighttransmittance of the transparent display area 100A corresponding to thecamera is improved, a good photographing effect of the camera can beensured. Therefore, the display device of the present disclosure hasboth a good display effect and an under-screen photographing effect.

Although relative terms such as “upper” and “lower” are used in thisspecification to describe the relative relationship between onecomponent and another component shown, these terms are used in thisspecification only for convenience of description, for example,according to the direction shown in the drawings. It can be understoodthat if a device shown is turned upside down, the component described as“upper” will become the “lower” component. When a structure is “on”another structure, it may mean that the structure is integrally formedon the another structure, or that the structure is “directly” installedon the another structure, or that the structure is “indirectly”installed on the another structure through a further structure.

The terms “a”, “an”, “the”, “said” and “at least one” are used toindicate the presence of one or more elements/components/etc.; the terms“including” and “have” are used to indicate open-ended inclusive meansand means that there may be additional elements/components/etc. inaddition to the listed elements/components/etc.

Those skilled in the art will easily conceive of other embodiments ofthe present disclosure after considering the specification andpracticing the present invention disclosed herein. The presentapplication is intended to cover any variations, uses, or adaptivechanges of the present disclosure. These variations, uses, or adaptivechanges follow the general principles of the present disclosure andinclude common knowledge or conventional technical means in thetechnical field that are not disclosed in the present disclosure. Thedescription and the embodiments are only regarded as exemplary, and thetrue scope and spirit of the present disclosure are pointed out by theappended claims.

1. A display panel, wherein the display panel has a display area and aperipheral area, the display area comprises a main display area and atransparent display area, and the display panel comprises: at least onefirst sub-pixel, located in the transparent display area, and comprisinga first pixel electrode; at least one first pixel driving circuit,located in the peripheral area; at least one transparent lead,connecting the first pixel electrode and the first pixel drivingcircuit, so that the first pixel driving circuit drives the firstsub-pixel to emit light.
 2. The display panel according to claim 1,wherein at least two of the transparent leads are located on differentlayers, and projections, in a thickness direction of the display panel,of the transparent leads located on the different layers are partiallyoverlapped.
 3. The display panel according to claim 1, wherein thetransparent lead comprises a first sub-transparent lead and a secondsub-transparent lead connected to each other, the first sub-transparentlead extends in a row direction and is located in the peripheral area,and the second transparent sub-lead extends in a column direction and islocated at least in the display area.
 4. The display panel according toclaim 1, wherein the transparent lead comprises a material of ITO,silver nanowire or graphene.
 5. The display panel according to claim 1,wherein the display panel further comprises: at least one first gatedriving circuit, located in the peripheral area; at least one first scanline, located in the peripheral area, wherein the first scan lineconnects the first gate driving circuit and the first pixel drivingcircuit, so that the first gate driving circuit provides the first pixeldriving circuit with a scan signal.
 6. The display panel according toclaim 5, wherein each of the first gate driving circuits and each of thefirst pixel driving circuits are arranged at a same side of thetransparent display area.
 7. The display panel according to claim 6,wherein all the first sub-pixels are divided into a plurality of rows,and respective first sub-pixels corresponding to at least one of thefirst gate driving circuits are located in a same row.
 8. The displaypanel according to claim 7, wherein respective first pixel drivingcircuits connected to the first sub-pixels located in the same row formsone or more pixel driving circuit islands, and respective pixel drivingcircuit islands are arranged in a row direction at a side, close to thetransparent display area, of the peripheral area.
 9. The display panelaccording to claim 8, wherein the respective pixel driving circuits inthe pixel driving circuit island are arranged in the row direction, andthe first scan line corresponding to the pixel driving circuit islandextends in the row direction and is sequentially connected to therespective pixel driving circuits in the pixel driving circuit island.10. The display panel according to claim 1, wherein the display panelfurther comprises: at least one second sub-pixel, located in the maindisplay area, and comprising a second sub-pixel electrode; and at leastone second pixel driving circuit, located in the main display area,electrically connected to the second sub-pixel electrode, and configuredto drive the second sub-pixel to emit light, wherein pixel densities ofthe transparent display area and the main display area are same.
 11. Thedisplay panel according to claim 10, wherein the display panel furthercomprises: at least one second gate driving circuit, located in theperipheral area; at least one second scan line, located in theperipheral area and the display area, wherein the second scan lineconnects the second gate driving circuit and the second pixel drivingcircuit, so that the second gate driving circuit provides the secondpixel driving circuit with a scan signal.
 12. The display panelaccording to claim 11, wherein the display panel further comprises: aplurality of first data lines, connected to the first pixel drivingcircuit and the second pixel driving circuit corresponding to the firstsub-pixel and the second sub-pixel in a same column, wherein the firstdata line extends along the column direction and bypasses an edge of thetransparent display area.
 13. A display device, comprising a displaypanel and a camera, wherein the display panel has a display area and aperipheral area, the display area comprises a main display area and atransparent display area, and the display panel comprises: at least onefirst sub-pixel, located in the transparent display area, and comprisinga first pixel electrode; at least one first pixel driving circuit,located in the peripheral area; at least one transparent lead,connecting the first pixel electrode and the first pixel drivingcircuit, so that the first pixel driving circuit drives the firstsub-pixel to emit light, and wherein the camera is arranged on abacklight side of the display panel and corresponds to the transparentdisplay area.
 14. The display device according to claim 13, wherein atleast two of the transparent leads are located on different layers, andprojections, in a thickness direction of the display panel, of thetransparent leads located on the different layers are partiallyoverlapped.
 15. The display device according to claim 13, wherein thetransparent lead comprises a first sub-transparent lead and a secondsub-transparent lead connected to each other, the first sub-transparentlead extends in a row direction and is located in the peripheral area,and the second transparent sub-lead extends in a column direction and islocated at least in the display area.
 16. The display device accordingto claim 13, wherein the transparent lead comprises a material of ITO,silver nanowire or graphene.
 17. The display device according to claim13, wherein the display panel further comprises: at least one first gatedriving circuit, located in the peripheral area; at least one first scanline, located in the peripheral area, wherein the first scan lineconnects the first gate driving circuit and the first pixel drivingcircuit, so that the first gate driving circuit provides the first pixeldriving circuit with a scan signal.
 18. The display device according toclaim 17, wherein each of the first gate driving circuits and each ofthe first pixel driving circuits are arranged at a same side of thetransparent display area.
 19. The display device according to claim 18,wherein all the first sub-pixels are divided into a plurality of rows,and respective first sub-pixels corresponding to at least one of thefirst gate driving circuits are located in a same row.
 20. The displaydevice according to claim 19, wherein respective first pixel drivingcircuits connected to the first sub-pixels located in the same row formsone or more pixel driving circuit islands, and respective pixel drivingcircuit islands are arranged in a row direction at a side, close to thetransparent display area, of the peripheral area.